A wind-resistant flexible wing plate and a horizontal cable-stayed bridge

Abstract

This invention discloses a wind-resistant flexible wing plate and a horizontal cable-stayed bridge, comprising a wing plate body for cantilevered installation on the side of an external horizontal cable-stayed bridge to guide airflow. The wing plate body includes a connecting section for connecting to the external horizontal cable-stayed bridge, and the connecting section extends outward along the transverse direction of the bridge, forming a cantilevered section for guiding airflow. By setting the connecting section, the wing plate body can be cantilevered to the external horizontal cable-stayed bridge. Specifically, the connecting section located on the inner side is fixedly connected to the external horizontal cable-stayed bridge, and the cantilevered section extends towards the side opposite to the external horizontal cable-stayed bridge and cantilevers outward, so that the transverse airflow must pass through the cantilevered section before blowing towards the external horizontal cable-stayed bridge. This changes the aerodynamic shape of the bridge, alters the flow pattern around the bridge, and affects the vortex structure on the upper and lower surfaces of the bridge, thereby improving the aerodynamic stability of the bridge.

Description

Technical Field

[0001] This invention relates primarily to the field of cable-stayed bridge technology, and more particularly to a wind-resistant flexible wing plate and a cable-stayed bridge. Background Technology

[0002] Unlike rigid bridges such as steel and concrete bridges, cable-stayed bridges belong to the category of flexible bridge systems. Compared to other bridge types, cable-stayed bridges have advantages such as faster erection, lower project investment, and less construction difficulty. In mountainous areas such as Yunnan, Guizhou, and Sichuan, cable-stayed bridges are particularly suitable for solving the transportation problems of residents. However, due to their simple structural form, lightweight and low-stiffness bridge deck, and poor wind resistance, wind-induced vibrations frequently occur. Existing cable-stayed bridges only improve wind resistance by installing stabilizing beams, but their effect is very limited and still falls short of the desired results. Therefore, there is an urgent need for a wind-resistant flexible wing plate that can further mitigate wind-induced vibrations, and for cable-stayed bridges equipped with such a wind-resistant flexible wing plate. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a wind-resistant flexible wing plate and a horizontal cable-stayed bridge.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A wind-resistant flexible wing plate includes a wing plate body for cantilever installation on the side of an external cable-stayed bridge to guide airflow. The wing plate body includes a connecting section for connection with the external cable-stayed bridge, and the connecting section extends outward along the transverse direction of the bridge and is formed with a cantilever section for guiding airflow.

[0006] As a further improvement to the above technical solution:

[0007] The connecting section is configured as a rigid flat plate.

[0008] The connecting section is connected to the external cable-stayed bridge via an installation mechanism; the installation mechanism includes a connecting buckle located below the connecting section for clamping the external steel cable, and fastening bolts that pass through the connecting buckle, the connecting section and the external bridge deck from bottom to top; by tightening the fastening bolts, the connecting section can be clamped by the connecting buckle and the bridge deck.

[0009] The connecting buckle is designed in a waist shape, which can simultaneously clamp two external steel cables, and the two external steel cables are symmetrically distributed on both sides of the fastening bolt.

[0010] The connecting section is welded or bonded to the external cable-stayed bridge.

[0011] The cantilever section includes a plate section connected to the connecting section. The plate section is configured as a downward-curved flexible plate, and the curvature of the plate section can change with the airflow.

[0012] The cantilever section also includes a flange formed on the outer side of the body section, and the flange is streamlined.

[0013] A type of cable-stayed bridge, wherein any of the above-mentioned wind-resistant flexible wing panels are installed on the side of the cable-stayed bridge.

[0014] As a further improvement to the above technical solution:

[0015] The cable-stayed bridge includes several steel cables arranged in the same direction and tensioned. A bridge deck is laid flat on the steel cables. A wing plate body for guiding airflow is sandwiched between the steel cables and the bridge deck. The wing plate body extends out of the side of the cable-stayed bridge in the transverse direction.

[0016] Angle steel is pressed along the longitudinal direction of the bridge deck edge, and the angle steel is used to connect adjacent wing plate bodies into a whole by fastening bolts.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] By incorporating a connecting section, the wing plate body can be cantilevered and connected to the external cable-stayed bridge. Specifically, the connecting section located on the inner side is fixedly connected to the external cable-stayed bridge, while the cantilevered section extends outward toward the side opposite to the external cable-stayed bridge. This causes the lateral airflow to be guided by the cantilevered section before reaching the external cable-stayed bridge, thereby altering the aerodynamic shape of the bridge, changing the flow pattern around the bridge, and influencing the vortex structure on the upper and lower surfaces of the bridge, ultimately improving the aerodynamic stability of the bridge. Attached Figure Description

[0019] Figure 1 This is an assembly diagram of the wingplate body;

[0020] Figure 2 This is a structural schematic diagram of a cable-stayed bridge.

[0021] The labels in the diagram represent: 1. Cable-stayed bridge; 11. Steel cable; 12. Bridge deck; 13. Angle steel; 2. Wing plate body; 21. Connecting section; 22. Cantilever section; 221. Plate section; 222. Flange; 23. Installation mechanism; 231. Connecting buckle; 232. Fastening bolt; 3. Balance beam; 4. Balance steel cable. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 and Figure 2As shown, the wind-resistant flexible wing plate of this embodiment includes a wing plate body 2 for cantilevered installation on the side of the external cable-stayed bridge 1 to guide airflow. The wing plate body 2 includes a connecting section 21 for connecting to the external cable-stayed bridge 1. The connecting section 21 extends outward along the transverse direction of the bridge and is formed with a cantilevered section 22 for guiding airflow. By setting the connecting section 21, the wing plate body 2 can be cantilevered to the external cable-stayed bridge 1. Specifically, the connecting section 21 located on the inner side is fixedly connected to the external cable-stayed bridge 1, and the cantilevered section 22 extends towards the side away from the external cable-stayed bridge 1 and cantilevers outward, so that the transverse airflow must pass through the cantilevered section 22 before blowing towards the external cable-stayed bridge 1. This changes the aerodynamic shape of the bridge, alters the flow pattern around the bridge, and affects the vortex structure on the upper and lower surfaces of the bridge, thereby improving the aerodynamic stability of the bridge.

[0024] In this embodiment, the connecting section 21 is configured as a rigid flat plate, which is stably connected to the external cable-stayed bridge 1 on one hand and supports the cantilever section 22 on the other. Specifically, the connecting section 21 and the cantilever section 22 are integrally formed and smoothly transitioned.

[0025] In this embodiment, the connecting segment 21 is connected to the external cable-stayed bridge 1 via the installation mechanism 23. The installation mechanism 23 includes a connecting buckle 231 located below the connecting segment 21 for clamping the external steel cables 11, and fastening bolts 232 that pass through the connecting buckle 231, the connecting segment 21, and the external bridge deck 12 from bottom to top. By tightening the fastening bolts 232, the connecting segment 21 can be clamped by the connecting buckle 231 and the bridge deck 12. The connecting buckle 231 is designed in a waist shape, which can clamp two external steel cables 11 at the same time, and the two external steel cables 11 are symmetrically distributed on both sides of the fastening bolt 232. By designing the waist-shaped connecting buckle 231, two external steel cables 11 can be simultaneously inserted into it and arranged on both sides of the fastening bolt 232, so as to ensure that the stress on the connecting segment 21 is more even. Meanwhile, by sequentially passing the fastening bolts 232 through the connecting buckle 231, the connecting section 21, and the outer bridge deck 12, tightening the fastening bolts 232 brings the connecting buckle 231 and the outer bridge deck 12 closer together, thereby generating a clamping force on the connecting section 21 and achieving a stable connection. Conversely, when the fastening bolts 232 are tightened in the opposite direction, the connecting buckle 231 and the outer bridge deck 12 move away from each other, allowing the connecting section 21 to be separated from the outer cable-stayed bridge 1 for easier maintenance and replacement. In other embodiments, to simplify the structure, reduce costs, and simplify assembly, the connecting section 21 and the outer cable-stayed bridge 1 can also be welded or bonded.

[0026] In this embodiment, the cantilever section 22 includes a plate section 221 connected to the connecting section 21. The plate section 221 is configured as a downwardly curved flexible plate, and the curvature of the plate section 221 can change with the airflow. The cantilever section 22 also includes a flange 222 formed on the outer side of the plate section 221, and the flange 222 is streamlined. By configuring the plate section 221 as a downwardly curved flexible plate, under the action of lateral airflow, the plate section 221 can change its curvature according to the incoming flow, thereby changing the aerodynamic shape of the bridge, changing the flow pattern around the bridge, and affecting the vortex structure on the upper and lower surfaces of the bridge, thereby improving the aerodynamic stability of the bridge. Preferably, the plate section 221 is made of a high-strength material, such as high-strength resin, wood, steel, or plastic; and the lateral stiffness of the plate section 221 is less than its axial stiffness. Furthermore, the plate section 221 and the flange 222 are integrally formed and smoothly transitioned.

[0027] Preferably, the length of the wing plate body 2 along the transverse direction of the bridge is set to 0cm (excluding)-60cm, and the thickness is 0cm (excluding)-10cm.

[0028] In this embodiment, the cable-stayed bridge 1 has wind-resistant flexible wing plates installed on its side as described above. Based on the mechanism of bridge aerodynamic instability, by installing wind-resistant flexible wing plates on the side of the cable-stayed bridge 1, the flow pattern around the bridge is changed, thereby improving the aerodynamic stability of the main girder. The wind-resistant flexible wing plates are simple in design and low in cost, and can be used in newly built cable-stayed bridges or added to existing ones. Furthermore, the wind-resistant flexible wing plates are easy to install and remove, facilitating reuse. Specifically, the design stiffness and dimensions of the wind-resistant flexible wing plates can be adjusted according to the wind field conditions where the bridge is located, allowing them to passively deflect according to the incoming flow. This alters the aerodynamic shape of the bridge, changes the flow pattern around the bridge, and affects the vortex structure on the upper and lower surfaces of the bridge, thereby improving the aerodynamic stability of the bridge.

[0029] In this embodiment, the cable-stayed bridge 1 includes several parallel and tensioned steel cables 11. A bridge deck 12 is laid flat on the steel cables 11. A wing plate body 2 for guiding airflow is sandwiched between the steel cables 11 and the bridge deck 12. The wing plate body 2 extends outward from the side of the cable-stayed bridge 1 in the transverse direction. By setting the wing plate body 2 to protrude from the side of the cable-stayed bridge 1, the transverse airflow must first be guided by the wing plate body 2 before blowing outward onto the cable-stayed bridge 1. This changes the aerodynamic shape of the bridge, alters the flow pattern around the bridge, and affects the vortex structure on the upper and lower surfaces of the bridge, thereby improving the aerodynamic stability of the bridge.

[0030] In this embodiment, angle steel 13 is pressed along the longitudinal direction of the bridge deck 12 at its edge. The angle steel 13 connects adjacent wing plate bodies 2 into a whole by fastening bolts 232. For ease of transportation and construction, both the bridge deck 12 and the wing plate bodies 2 are set as small plates and spliced ​​onto the steel cable 11. To ensure that adjacent wing plate bodies 2 can be stably connected to form a whole, angle steel 13 is pressed along the length of the bridge deck 12 at its edge. Each angle steel 13 can span at least two wing plate bodies 2. By passing through fastening bolts 232, the angle steel 13 can be connected to the wing plate body 2 into a whole, thereby achieving fixation between adjacent wing plate bodies 2.

[0031] Preferably, the cable-stayed bridge also includes several balance beams 3 spaced apart along the longitudinal direction of the bridge. The balance beams 3 are arranged along the transverse direction of the bridge and their ends extend out of the bridge deck 12. The ends of the balance beams 3 are connected by balance steel cables 4 extending along the longitudinal direction of the bridge.

[0032] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A wind-resistant flexible wing panel, characterized in that: Includes a wing plate body (2) for cantilever installation on the side of the horizontal cable-stayed bridge (1) to guide airflow, the wing plate body (2) including a connecting section (21) for connecting to the horizontal cable-stayed bridge (1), the connecting section (21) extending outward along the transverse direction of the bridge and forming a cantilever section (22) for guiding airflow. The connecting section (21) is configured as a rigid plate; The cantilever section (22) includes a plate section (221) connected to the connecting section (21). The plate section (221) is configured as a downward-curved flexible plate, and the curvature of the plate section (221) can change with the airflow.

2. The wind-resistant flexible wing panel according to claim 1, characterized in that: The connecting section (21) is connected to the cable-stayed bridge (1) via the installation mechanism (23); the installation mechanism (23) includes a connecting buckle (231) located below the connecting section (21) for clamping the steel cable (11), and fastening bolts (232) passing through the connecting buckle (231), the connecting section (21) and the bridge deck (12) from bottom to top; by tightening the fastening bolts (232), the connecting section (21) can be clamped by the connecting buckle (231) and the bridge deck (12).

3. The wind-resistant flexible wing panel according to claim 2, characterized in that: The connecting buckle (231) is designed in a waist shape, which can simultaneously clamp two steel cables (11), and the two steel cables (11) are symmetrically distributed on both sides of the fastening bolt (232).

4. The wind-resistant flexible wing panel according to claim 1, characterized in that: The connecting section (21) is welded or bonded to the cable-stayed bridge (1).

5. The wind-resistant flexible wing panel according to claim 1, characterized in that: The cantilever section (22) also includes a flange (222) formed on the outside of the body section (221), the flange (222) being streamlined.

6. A type of horizontal cable-stayed bridge, characterized in that: The side of the Yuping cable-stayed bridge (1) is equipped with a wind-resistant flexible wing plate as described in any one of claims 1-5.

7. The cable-stayed bridge according to claim 6, characterized in that: The horizontal cable-stayed bridge (1) includes several steel cables (11) arranged in the same direction and tensioned. A bridge deck (12) is laid flat on the steel cables (11). A wing plate body (2) for guiding airflow is sandwiched between the steel cables (11) and the bridge deck (12). The wing plate body (2) extends out of the side of the horizontal cable-stayed bridge (1) in the transverse direction.

8. The cable-stayed bridge according to claim 7, characterized in that: Angle steel (13) is pressed along the longitudinal direction of the edge of the bridge deck (12), and the angle steel (13) connects the adjacent wing plate bodies (2) into a whole by fastening bolts (232).

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